Soybean Rust – Close to Ohio in 2009 but no Cigar
Dr. Anne Dorrane, OSU Extension Pathologist, recently discussed how close soybean rust came to Ohio in 2009. Excerpted from the January 12, 2010 CORN Newsletter:
Soybean rust was a big topic again at the end of 2009. First detections in Kentucky were in early September and followed a month later on late planted soybeans in Southern Indiana. What was most impressive this year – was the amount of rust that built up in the southern states at the end of the season. A limited number of Mississippi producers had yield losses directly due to soybean rust based on reports from Dr. Tom Allen, their field crop pathologist. In addition to the soybean, the amount of kudzu that was also infected is also becoming an issue. The good news is that again, not all kudzu is susceptible to the current strains of soybean rust we have right now. And the kudzu patches that are Susceptible are getting placed on maps to make the scouting easier in the future.
The biggest announcement that was made at the 2010 APS National Soybean Rust Meeting held in December was that the sentinel plot system would change. And this is a good thing. We know more, we can be more efficient at scouting now that we know where to look and those of us in the north can get better and knowing when to look. There is no point in searching in Ohio, if the southern states are negative. For 2010, we will again be monitoring the maps and commentary from our southern colleagues at the Soybean Rust website (http://sbr.ipmpipe.org/cgi-bin/sbr/public.cgi). We will continue to monitor in Ohio as soybean rust continues to approach the middle tier of states. Hopefully it will continue to miss us or arrive to late to have an impact.